Korean Basic Grammar 90 is a free Android app developed by SVS under the Education & Reference category. The app is a useful tool for beginners who want to learn Korean grammar. It provides an efficient way to study and review the language's basic grammar rules.

The app contains 90 basic Korean grammar rules with examples available in three languages: Korean, English, and Khmer. This feature helps users better understand and remember the grammar usage. Moreover, the app provides a Khmer pronunciation guide through English and Korean phonetics, making it an excellent tool for those who want to learn Khmer as well.

Overall, Korean Basic Grammar 90 is a well-designed app that is easy to use and navigate. It offers a useful and efficient way to learn Korean grammar for beginners.